Chevrolet Astro Oxygen Sensor - Select Year

Position: Front
Direct Fit - - At Catalyst Inlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #25166816 -

Position: Front
Direct Fit - - At Catalyst Inlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #25166816 -

Quality: OEM
Position: Front
OE Connector - - (In Exhaust Manifold Cross- Over- 1 Wire) - At Catalyst Inlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - OE Style - 1-Wire - OE Style - 1-Wire - Brougham - OE Style - 1-Wire - Exc. California - OE Style - 1-Wire - L4 2.5 - OE Style - 1-Wire - L6 4.1 - OE Style - 1-Wire - Located at Manifold - OE Style - 1-Wire - Supercharged - OE Style - 1-Wire - V6 2.8 - OE Style - 1-Wire - V6 3.0 - OE Style - 1-Wire - V6 3.8 - OE Style - 1-Wire - V6 4.1 - OE Style - 1-Wire - V8 4.3 - OE Style - 1-Wire - V8 4.4 - OE Style - 1-Wire - V8 4.9 - OE Style - 1-Wire - V8 5.0 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #19211437 - w/ OEM #25166816 -

Quality: OEM
Position: Front
OE Connector - - (In Exhaust Manifold Cross- Over- 1 Wire) - At Catalyst Inlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - OE Style - 1-Wire - OE Style - 1-Wire - Brougham - OE Style - 1-Wire - Exc. California - OE Style - 1-Wire - L4 2.5 - OE Style - 1-Wire - L6 4.1 - OE Style - 1-Wire - Located at Manifold - OE Style - 1-Wire - Supercharged - OE Style - 1-Wire - V6 2.8 - OE Style - 1-Wire - V6 3.0 - OE Style - 1-Wire - V6 3.8 - OE Style - 1-Wire - V6 4.1 - OE Style - 1-Wire - V8 4.3 - OE Style - 1-Wire - V8 4.4 - OE Style - 1-Wire - V8 4.9 - OE Style - 1-Wire - V8 5.0 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #19211437 - w/ OEM #25166816 -

Quality: OEM
Position: Front
OE Type - - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - OE Style - 1-Wire - OE Style - 1-Wire - Brougham - OE Style - 1-Wire - Exc. California - OE Style - 1-Wire - L4 2.5 - OE Style - 1-Wire - L6 4.1 - OE Style - 1-Wire - Located at Manifold - OE Style - 1-Wire - Supercharged - OE Style - 1-Wire - V6 2.8 - OE Style - 1-Wire - V6 3.0 - OE Style - 1-Wire - V6 3.8 - OE Style - 1-Wire - V6 4.1 - OE Style - 1-Wire - V8 4.3 - OE Style - 1-Wire - V8 4.4 - OE Style - 1-Wire - V8 4.9 - OE Style - 1-Wire - V8 5.0 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #25166816 -

Quality: OEM
Position: Front
OE Type - - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - OE Style - 1-Wire - OE Style - 1-Wire - Brougham - OE Style - 1-Wire - Exc. California - OE Style - 1-Wire - L4 2.5 - OE Style - 1-Wire - L6 4.1 - OE Style - 1-Wire - Located at Manifold - OE Style - 1-Wire - Supercharged - OE Style - 1-Wire - V6 2.8 - OE Style - 1-Wire - V6 3.0 - OE Style - 1-Wire - V6 3.8 - OE Style - 1-Wire - V6 4.1 - OE Style - 1-Wire - V8 4.3 - OE Style - 1-Wire - V8 4.4 - OE Style - 1-Wire - V8 4.9 - OE Style - 1-Wire - V8 5.0 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #25166816 -

Position: Front
Direct Fit - - Exc. Supercharged - w/ 3-Wire Sensor -

Direct Fit - - (Before Catalyst) - After Catalyst - At Catalyst Inlet - At Catalyst Inlet or Outlet - At Catalyst Outlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet or Catalyst Outlet - At Left or Right Y-pipe Inlet & At Catalyst Outlet - At Y-pipe Inlet & Catalyst inlet or Outlet - Before Catalyst - Before Catalyst
(At Exhaust Manifold- Inline Connector) - Catalyst Inlet or Catalyst Outlet - Exc. Electronic Control Transmission - Front - 2 Required Rear - 1 Required - Front/Rear - Front/Rear Front - Front/Rear Front (2-Required) - Front/Rear Front - 2 Required - Front/Rear Front - 2 Required Rear - 1 Requried - Front/Rear Front 2 Required - Front/Rear Rear 2 Required - Front/Rear Rear After catalyst - GVW under 8500 Lbs. - Position 2 (Includes Inline Connector) (Pre Converter) - w/ 4L60E Transmission
(Before Catalyst) - w/ Electonic Transmission - w/ Electronic Automatic Transmission - w/ Electronic Transmission - w/ or w/o Canada Built - w/ or w/o Canada Built w/ Regular or Flex Fuel Engine -

Direct Fit - - (After Catalyst) - (Before Catalyst) - (Before Catalytst) - After Catalyst - After Catalyst
(Square Connector) - After Catalyst
Right - At Exhaust Manifold - At Exhaust Manifold
w/ Heated Sensor - Exc. Canada Built - Exc. Canada Built w/ Regular or Flex Fuel Engine - Except California Emission System
(Before Catalyst) - Except Mexico of Canadian Built Vehicle
(After Catalyst) - Except Mexico or Canadian Built Vehicle
(After Catalyst) - GVW under 8500 lbs. - Located at Manifold - Position 1 (In Exhaust Manifold/ Crossover) - w/ 4-Wire Sensors
(Before Catalyst) - w/ Canada Built -

Quality: OEM
Position: Front Left
- After Catalyst - At Catalyst Outlet) - Before Catalyst - Before Catalyst & After Catalyst - Engine - L61 - Position 2 -

Position: Front Left
Direct Fit - - After Catalyst - After Catalyst
Right - California - Position 2 & 3 : Federal -Front/Rear - Front & Rear - Front - 2 Required Rear - 2 Required - Position 2 & Position 3 - w/ Calif, Position 2 & 3 w/ Federal, Front/Rear -

Position: Front Right Rear
- Before Catalyst - California - Canada Built - Front - 2 Required Rear - 1 Required - Front - 2 Required Rear - 2 Required - Late Production - Pre Converter (Position 2) - Stamped 12559850 - w/ Canada Built - w/ Canada Built w/ Regular or Flex Fuel Engine - w/ Mexicio or Canadian Built Vehicle
(After Catalyst) - w/ Mexico or Canadian Built Vehicle
(VIN "T")
(After Catalyst) - w/ Pre Converter (Position 2) -

Quality: OEM
OE Type - - (Before Catalyst) - After Catalyst - At Catalyst Inlet - At Catalyst Inlet or Outlet - At Catalyst Outlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet or Catalyst Outlet - At Left or Right Y-pipe Inlet & At Catalyst Outlet - At Y-pipe Inlet & Catalyst inlet or Outlet - Before Catalyst - Before Catalyst
(At Exhaust Manifold- Inline Connector) - California - Catalyst Inlet or Catalyst Outlet - Exc. Electronic Control Transmission - Front - 2 Required Rear - 1 Required - Front - 2 Required Rear - 2 Required - Front/Rear - Front/Rear Front - Front/Rear Front (2-Required) - Front/Rear Front - 2 Required - Front/Rear Front - 2 Required Rear - 1 Requried - Front/Rear Front 2 Required - Front/Rear Rear 2 Required - Front/Rear Rear After catalyst - GVW under 8500 Lbs. - Position 2 (Includes Inline Connector) (Pre Converter) - w/ 4L60E Transmission
(Before Catalyst) - w/ Electonic Transmission - w/ Electronic Automatic Transmission - w/ Electronic Transmission - w/ or w/o Canada Built - w/ or w/o Canada Built w/ Regular or Flex Fuel Engine -

Quality: OEM
OE Type - - (After Catalyst) - (Before Catalyst) - (Before Catalytst) - After Catalyst - After Catalyst
(Square Connector) - After Catalyst
Right - At Exhaust Manifold - At Exhaust Manifold
w/ Heated Sensor - Before Catalyst - Exc. Canada Built - Exc. Canada Built w/ Regular or Flex Fuel Engine - Except California Emission System
(Before Catalyst) - Except Mexico of Canadian Built Vehicle
(After Catalyst) - Except Mexico or Canadian Built Vehicle
(After Catalyst) - GVW under 8500 lbs. - Located at Manifold - Position 1 (In Exhaust Manifold/ Crossover) - w/ 4-Wire Sensors
(Before Catalyst) - w/ Canada Built -

Quality: OEM
OE connector - - (After Catalyst) - (Before Catalyst) - (Before Catalytst) - After Catalyst - After Catalyst
(Square Connector) - After Catalyst
Right - At Exhaust Manifold - At Exhaust Manifold
w/ Heated Sensor - Exc. Canada Built - Exc. Canada Built w/ Regular or Flex Fuel Engine - Except California Emission System
(Before Catalyst) - Except Mexico of Canadian Built Vehicle
(After Catalyst) - Except Mexico or Canadian Built Vehicle
(After Catalyst) - GVW under 8500 lbs. - Located at Manifold - Position 1 (In Exhaust Manifold/ Crossover) - w/ 4-Wire Sensors
(Before Catalyst) - w/ Canada Built -

- (Before Catalyst) - After Catalyst - At Catalyst Inlet or Outlet - At Catalyst Outlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet or Catalyst Outlet - At Left or Right Y-pipe Inlet & At Catalyst Outlet - At Y-pipe Inlet & Catalyst inlet or Outlet - Before Catalyst - Before Catalyst
(At Exhaust Manifold- Inline Connector) - Catalyst Inlet or Catalyst Outlet - Exc. Electronic Control Transmission - Front - 2 Required Rear - 1 Required - GVW under 8500 Lbs. - Position 2 (Includes Inline Connector) (Pre Converter) - w/ 4L60E Transmission
(Before Catalyst) - w/ Electonic Transmission - w/ Electronic Automatic Transmission - w/ Electronic Transmission - w/ or w/o Canada Built - w/ or w/o Canada Built w/ Regular or Flex Fuel Engine -

Quality: OEM
Position: Front Right Rear
- After Catalyst - Before Catalyst - California - Canada Built - Front - 2 Required Rear - 1 Required - Front - 2 Required Rear - 2 Required - Late Production - Pre Converter (Position 2) - Stamped 12559850 - w/ Canada Built - w/ Canada Built w/ Regular or Flex Fuel Engine - w/ Mexicio or Canadian Built Vehicle
(After Catalyst) - w/ Mexico or Canadian Built Vehicle
(VIN "T")
(After Catalyst) - w/ Pre Converter (Position 2) -

Quality: OEM
OE Connector - - (Before Catalyst) - After Catalyst - At Catalyst Inlet or Outlet - At Catalyst Outlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet or Catalyst Outlet - At Left or Right Y-pipe Inlet & At Catalyst Outlet - At Y-pipe Inlet & Catalyst inlet or Outlet - Before Catalyst - Before Catalyst
(At Exhaust Manifold- Inline Connector) - Catalyst Inlet or Catalyst Outlet - Exc. Electronic Control Transmission - Front - 2 Required Rear - 1 Required - Front/Rear - Front/Rear Front - Front/Rear Front (2-Required) - Front/Rear Front - 2 Required - Front/Rear Front - 2 Required Rear - 1 Requried - Front/Rear Front 2 Required - Front/Rear Rear 2 Required - Front/Rear Rear After catalyst - GVW under 8500 Lbs. - Position 2 (Includes Inline Connector) (Pre Converter) - w/ 4L60E Transmission
(Before Catalyst) - w/ Electonic Transmission - w/ Electronic Automatic Transmission - w/ Electronic Transmission - w/ or w/o Canada Built - w/ or w/o Canada Built w/ Regular or Flex Fuel Engine -

Quality: OEM
Position: Front
OE Connector - - (In Exhaust Manifold Cross-Over - 3 wire) - California Emissions - Transmission Code 4L60E - w/ 3-Wire Sensor - w/ Transmission Code 4L60E -

Quality: OEM
Position: Rear
- After Catalyst - Before Catalyst - Position 1 (In Exhaust Manifold/ Crossover) -

Quality: OEM
Position: Front Right
- After Catalyst - Before Catalyst - Position 1 (In Exhaust Manifold/ Crossover) -

Direct Fit - - After Catalyst - Before Catalyst - Engine - L61 - Front - 2 Required Rear - 1 Required - Position 1 -

Quality: OEM
Position: Front
- Exc. Supercharged - w/ 3-Wire Sensor -

Quality: OEM
Position: Front
- Transmission Code 4L60E - w/ Transmission Code 4L60E -

Quality: OEM
After Catalyst
(Square Connector) -

Quality: OEM
- Front - 2 Required Rear - 1 Required -